Don’t send the funding spend to onchaind if we detect it in inflights (aka. a splice). While we already prevented onchaind_funding_spent from being called directly, the call to wallet_channeltxs_add meant onchaind_funding_spent would be called *anyway* on restart. This is now fixed.
Additionally there was a potential for a race problem depending on the firing order of the channel depth and and funding spent events.
Instead of requiring these events fire in a specific order, we make a special “memory only” inflight object to prevent the race regardless of firing order.
Changelog-Fixed: Splice: bugfix for restart related race condition interacting with adversarial close detection.
Update the lightningd <-> channeld interface with lots of new commands to needed to facilitate spicing.
Implement the channeld splicing protocol leveraging the interactivetx protocol.
Implement lightningd’s channel_control to support channeld in its splicing efforts.
Changelog-Added: Added the features to enable splicing & resizing of active channels.
Update gossip routiens and various other hecks on the channel state to consider AWAITING_SPLICE to be routable and treated similar to CHANNELD_NORMAL.
Small updates to psbt interface
Changelog-None
`struct log` becomes `struct logger`, and the member which points to the
`struct log_book` becomes `->log_book` not `->lr`.
Also, we don't need to keep the log_book in struct plugin, since it has
access to ld's log_book.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is the simple version which always tries to keep some sats if we
have an anchor channel. Turns out that we need something more
sophisticated for multifundchannel, so that's next.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: JSON-RPC: `withdraw` will refuse to spend funds below `min-emergency-msat` if we have any anchor channels (and `all` will be reduced appropriately).
Changelog-Changed: JSON-RPC: `fundpsbt` and `utxopsbt` will refuse to spend funds below `min-emergency-msat` if we have any anchor channels.
This is an internal type: it has no API guarantees (indeed, I'm about
to change it, which is how I discovered scb was using it).
Fortunately for every case we care about, it is actually a wireaddr
(in theory the peer can connect locally using a local socket, but this
is mostly for testing and is a very strange setup, and so simply don't
do scb for those).
In this case, the wire encoding is a single byte followed by the
wireaddr, so open-code that in scb_wire.csv for compatibility.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We always call channel_fail_transient() on all channels when a peer
connects, to clean up any previous connections. However, when
we startup, this channel doesn't have an owner yet, resulting in
a fairly weird INFO level message.
Reported-by: Michael Schmook @mschmook
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Fixed: `lightningd`: don't log gratuitous "Peer transient failure" message on first connection after restart.
It's not likely but possible that the node's settings will shift btw a
start and an RBF; we persist the setting to the database so we don't
lose it.
Right now holding onto it forever is kind of extra but maybe we'll
reuse the setting for splices? idk.
Should this be a channel type??
technically we don't need this info after the channel opens, but for any
subsequent RBF (and maybe splice?) we need to remember what the
open/accept peer signaled
We didn't actually populate them properly, and the real annotations
are on inputs and outputs.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-EXPERIMENTAL: JSON-RPC: `listtransactions` `channel` and `type` field removed at top level.
After connecting 100,000 peers with one channel each (not all at
once!), we see various places where we exhibit O(N^2) behaviour.
Fix these by keeping a map of id->peer instead of a simple
linked-list.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
First, merge the _ahf_ and non-ahf interfaces.
Second, remove the always-NULL txs->cmd field.
Then, add optional id_prefix for bitcoind_sendrawx, so if it's
triggered by a command (e.g. "withdraw") it's shown correctly in logs.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This contains the zeroconf stuff, with funding_locked renamed to
channel_ready. I change that everywhere, and try to fix up the
comments.
Also the `alias` field is called `short_channel_id`.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: Protocol: `funding_locked` is now called `channel_ready` as per latest BOLTs.
Again, we should use the real channel_type, but we approximate.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: Protocol: private channels will only route using short-channel-ids if channel opened with option_scid_alias-supporting peer.
We used to tell connectd to remember our connect delay, and hand it
back (increased if necessary).
Instead, simply record when we last tried to connect. If it was less
than 10 minutes ago, double delay (up to 5 minutes max), otherwise
reset delay to 1 second.
This covers all scenarios: whether we reconnect then immediately
disconnect, or never successfully connect, it doesn't matter.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Fixes: #5453
The only places which should call try_reconnect now are the "connect"
command, and the disconnect path when it decides there's still an
active channel.
This introduces one subtlety: if we disconnect when there's no active
channel, but then the subd makes one, we have to catch that case!
This temporarily reverts "slow" reconnections to fast ones: see next
patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Connectd already does this when we *receive* an error or warning, but
now do it on send. This causes some slight behavior change: we don't
disconnect when we close a channel, for example (our behaviour here
has been inconsistent across versions, depending on the code).
When connectd is told to disconnect, it now does so immediately, and
doesn't wait for subds to drain etc. That simplifies the manual
disconnect case, which now cleans up as it would from any other
disconnection when connectd says it's disconnected.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's directly a product of "does it have a current owner subdaemon"
and "does that subdaemon talk to peers", so create a helper function
which just evaluates that instead.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We have them split over common/param.c, common/json.c,
common/json_helpers.c, common/json_tok.c and common/json_stream.c.
Change that to:
* common/json_parse (all the json_to_xxx routines)
* common/json_parse_simple (simplest the json parsing routines, for cli too)
* common/json_stream (all the json_add_xxx routines)
* common/json_param (all the param and param_xxx routines)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Caused a crash in CI, reproduced under valgrind by calling
any_channel_by_scid from io_poll_lightningd:
```
==2422524== Conditional jump or move depends on uninitialised value(s)
==2422524== at 0x12C98D: any_channel_by_scid (channel.c:606)
==2422524== by 0x14FF75: io_poll_lightningd (lightningd.c:682)
==2422524== by 0x225FDE: io_loop (poll.c:420)
==2422524== by 0x14A914: io_loop_with_timers (io_loop_with_timers.c:22)
==2422524== by 0x150C4E: main (lightningd.c:1193)
==2422524== Uninitialised value was created by a heap allocation
==2422524== at 0x483B7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==2422524== by 0x234F61: allocate (tal.c:250)
==2422524== by 0x235522: tal_alloc_ (tal.c:428)
==2422524== by 0x12B500: new_unsaved_channel (channel.c:203)
==2422524== by 0x13B77A: json_openchannel_init (dual_open_control.c:2610)
==2422524== by 0x14C78D: command_exec (jsonrpc.c:630)
==2422524== by 0x14CD9F: rpc_command_hook_final (jsonrpc.c:765)
==2422524== by 0x181DDA: plugin_hook_call_ (plugin_hook.c:278)
==2422524== by 0x14D198: plugin_hook_call_rpc_command (jsonrpc.c:853)
==2422524== by 0x14D6A0: parse_request (jsonrpc.c:957)
==2422524== by 0x14DAFE: read_json (jsonrpc.c:1054)
==2422524== by 0x2231C8: next_plan (io.c:59)
```
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We used to agree up on the `minimum_depth` with the peer, thus when
they told us that the funding locked we'd be sure we either have a
scid or we'd trigger the state transition when we do. However if we
had a scid, and we got a funding_locked we'd trust them not to have
sent it early. Now we explicitly track the depth in the channel while
waiting for the funding to confirm.
Changelog-Fixed: channeld: Enforce our own `minimum_depth` beyond just confirming
We use this in a couple of places, when we want to refer to a channel
by its `short_channel_id`, I'm moving this into a separate function
primarily to have a way to mark places where we do that.
`alias_local` is generated locally and sent to the peer so it knows
what we're calling the channel, while `alias_remote` is received by
the peer so we know what to include in routehints when generating
invoices.
This is generally verboten now, since there can be multiple. There are a
few exceptions:
1. We sometimes want to know if there are *any* active channels.
2. Some dev commands still take peer id when they mean channel_id.
3. We still allow peer id when it's fully determined.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: JSON-RPC: `close` by peer id will fail if there is more than one live channel (use `channel_id` or `short_channel_id` as id arg).
More efficient to search a known peer than the whole set.
Also, move find_channel_by_id() from channel_control.c into channel.c
where we'd expect it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Sure, we want to connect (usually) because of an active channel, but
it's not specific to the channel itself.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This means lightningd needs to create the temporary one and tell it to
openingd/dualopend, rather than the other way around.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Either because lightningd tells us it wants to talk, or because the peer
says something about a channel.
We also introduce a behavior change: we disconnect after a failed open.
We might want to modify this later, but we it's a side-effect of openingd
not holding onto idle connections.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The message from lightningd simply acknowleges that we are allowed to
discard the peer (because no subdaemons are talking to it anymore).
This difference becomes more stark once connectd holds on to idle
peers.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
